The term FAM. MEMBER is a collective term for members of a family, which can include siblings, relatives, and grandparents. The crossword solutions for this term are SIS (3 letters), REL (3 letters), SIB (3 letters), BRO (3 letters), DAU (3 letters), and GRAN (4 letters). SIS stands for sister, REL stands for relative, SIB stands for sibling, BRO stands for brother, DAU stands for daughter, and GRAN stands for grandmother. These terms all refer to different members of a family, and together they make up the term FAM. MEMBER.